6. The value of a2 + 2ab + b2 when a = -5, b = 2 is
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Step-by-step explanation:
a = - 5
b = 2
a^2 + 2ab + b^2
= a^2 + ab + ab + b^2
= a ( a + b ) + b ( a + b )
= ( a + b ) ( a + b )
= ( a + b )^2
= ( - 5 + 2 ) ^2
= ( - 3 )^2
= 9
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